The 23-year-old Hunger Games actor was photographed by TMZ website in a Vegas nightclub with blonde Mexican actress and singer Eiza González.
The photos show the pair laughing and appearing close as they partied with pals at the Encore hotel. A US magazine has also linked Hemsworth to Mad Men star 35-year-old January Jones, saying he has pursued her for some time.
The Hunger Games star's relationship with Cyrus has been rumoured to be on the rocks for quite some time, and both of their representatives have allegedly confirmed their decision not to get married at this time.
America’s People magazine reports its editors have received an exclusive statement the 20-year-old singer and 23-year-old actor, who met on the set of their 2010 movie The Last Song, have decided not to walk down the aisle.
The announcement comes after Miley unfollowed her fiancé on Twitter over the weekend.
Liam put a 3.5-carat Neil Lane ring on Miley’s finger in May 2012.
At the time the former Disney star expressed her delight their relationship was moving forward, sharing: "I'm so happy to be engaged and look forward to a life of happiness with Liam."
Rumours surfaced the couple had postponed the nuptials in April after Miley’s ring finger remained bare in a number of snaps.
However, the couple put on a united front in August when the American pop star attended her Australian partner's Paranoia film premiere.
The Wrecking Ball hitmaker is busy promoting her album Bangerz while Liam gets ready to promote the latest Hunger Games franchise flick Catching Fire.
Speaking to the October issue of America’s Harper’s Bazaar magazine, Miley addressed her pending wedding with Liam.
When asked in the interview, undertaken before the news of their split, about their big day she replied: "I definitely don't have time to deal with a wedding right now. But I will at some point."